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Enzymes are made from amino acids; they are protein molecules produced by living cells.
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| Submitted: Tue Nov 18 2003
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Page 1 Enzymes are made from amino acids; they are protein molecules produced by living cells. Each cell contains several hundred enzymes. They range in size from 1 x 104 "Daltons" to 1 x 106 Daltons with most being in the 105 range. The protein portion of an enzyme is called the apoenzyme. A cofactor is the non-protein part of an enzyme. Cofactors can be loosely bound, coenzymes or tightly bound, prosthetic groups. The complete enzyme (apportion + cofactor) is termed the holoenzyme. The efficiency of enzymes is extremely high. They can catalyse the transformation of as many as 102 to 106 molecules per minute. Most also have a high degree of specificity binding a specific molecule and converting it to a specific product. Enzyme and substrate fit into each other like a lock into a key. A cartoonist view of the formation of an enzyme-substrate complex In general enzyme have a...
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